# Local Docker Testing Guide

## Prerequisites

### 1. Install Docker Desktop (Mac)

Download and install from: https://www.docker.com/products/docker-desktop

Or use Homebrew:
```bash
brew install --cask docker
```

Start Docker Desktop from Applications.

### 2. Verify Installation

```bash
docker --version
docker-compose --version
```

## Quick Start

### 1. Create Local .env File

```bash
# Copy example
cp .env.example .env

# Edit with your values
nano .env
```

**Minimal .env for local testing:**
```bash
# Database
MYSQL_ROOT_PASSWORD=localrootpass123
MYSQL_PASSWORD=localvoxblogpass123

# Application
ADMIN_PASSWORD=admin123
OPENAI_API_KEY=sk-your-actual-openai-key-here
GHOST_ADMIN_API_KEY=leave-empty-if-not-using

# S3 Storage (use your actual credentials)
S3_BUCKET=your-bucket-name
S3_REGION=us-east-1
S3_ACCESS_KEY=your-access-key
S3_SECRET_KEY=your-secret-key
S3_ENDPOINT=https://s3.amazonaws.com

# Frontend (for local testing)
VITE_API_URL=http://localhost:3001
```

### 2. Build and Start

```bash
# Build and start all containers
docker-compose up --build

# Or run in background (detached mode)
docker-compose up --build -d
```

This will:
- Build the API Docker image
- Build the Admin Docker image
- Start MySQL database
- Start all services

**First build takes 5-10 minutes** (downloading dependencies, building images)

### 3. Wait for Services to Start

Watch the logs until you see:
```
voxblog-mysql   | ready for connections
voxblog-api     | Server listening on port 3001
voxblog-admin   | Configuration complete
```

### 4. Access Your Application

- **Frontend**: http://localhost:3000
- **API**: http://localhost:3001
- **API Health**: http://localhost:3001/health

### 5. Test the Application

1. Open http://localhost:3000 in your browser
2. Login with your ADMIN_PASSWORD
3. Create a post
4. Upload images
5. Generate content with AI

## Useful Commands

### View Logs

```bash
# All services
docker-compose logs -f

# Specific service
docker-compose logs -f api
docker-compose logs -f admin
docker-compose logs -f mysql

# Last 50 lines
docker-compose logs --tail=50 api
```

### Check Status

```bash
# See running containers
docker-compose ps

# See all Docker containers
docker ps
```

### Stop Services

```bash
# Stop all containers
docker-compose down

# Stop and remove volumes (deletes database!)
docker-compose down -v
```

### Restart Services

```bash
# Restart all
docker-compose restart

# Restart specific service
docker-compose restart api
docker-compose restart admin
```

### Rebuild After Code Changes

```bash
# Rebuild and restart
docker-compose up --build

# Rebuild specific service
docker-compose up --build api
docker-compose up --build admin
```

### Access Container Shell

```bash
# API container
docker-compose exec api sh

# MySQL container
docker-compose exec mysql mysql -u voxblog -p
# Enter MYSQL_PASSWORD when prompted
```

### Clean Up Everything

```bash
# Stop and remove containers
docker-compose down

# Remove all unused images
docker image prune -a

# Remove all unused volumes
docker volume prune

# Nuclear option - clean everything
docker system prune -a --volumes
```

## Troubleshooting

### Port Already in Use

If you get "port is already allocated" error:

```bash
# Check what's using the port
sudo lsof -i :3000
sudo lsof -i :3001

# Kill the process
kill -9 <PID>

# Or change ports in docker-compose.yml
ports:
  - "3002:80"   # Use 3002 instead of 3000
```

### Build Fails

```bash
# Clean build cache
docker-compose build --no-cache

# Remove old images
docker image prune -a

# Try again
docker-compose up --build
```

### Database Connection Error

```bash
# Check if MySQL is healthy
docker-compose ps

# View MySQL logs
docker-compose logs mysql

# Restart MySQL
docker-compose restart mysql

# Wait 30 seconds for MySQL to be ready
```

### Out of Disk Space

```bash
# Check Docker disk usage
docker system df

# Clean up
docker system prune -a
docker volume prune
```

### Container Keeps Restarting

```bash
# View logs to see error
docker-compose logs api

# Common issues:
# - Missing environment variables in .env
# - Database not ready (wait longer)
# - Port conflict
```

### Can't Access Frontend

1. Check if container is running: `docker-compose ps`
2. Check logs: `docker-compose logs admin`
3. Try accessing: `curl http://localhost:3000`
4. Check if port 3000 is free: `lsof -i :3000`

### API Returns 502 Error

1. Check if API is running: `docker-compose ps`
2. Check API logs: `docker-compose logs api`
3. Test API directly: `curl http://localhost:3001/health`
4. Check environment variables: `docker-compose exec api env`

## Development Workflow

### Making Code Changes

**Backend (API) changes:**
```bash
# Edit code in apps/api/
# Rebuild and restart
docker-compose up --build api
```

**Frontend (Admin) changes:**
```bash
# Edit code in apps/admin/
# Rebuild and restart
docker-compose up --build admin
```

### Database Changes

```bash
# Run migrations
docker-compose exec api pnpm run drizzle:migrate

# Generate new migration
docker-compose exec api pnpm run drizzle:generate
```

### View Database

```bash
# Access MySQL
docker-compose exec mysql mysql -u voxblog -p

# Show databases
SHOW DATABASES;
USE voxblog;
SHOW TABLES;

# Query data
SELECT * FROM posts;
```

## Testing Checklist

- [ ] Docker Desktop running
- [ ] `.env` file created with all values
- [ ] `docker-compose up --build` successful
- [ ] All 3 containers running (mysql, api, admin)
- [ ] Can access http://localhost:3000
- [ ] Can login with ADMIN_PASSWORD
- [ ] Can create a post
- [ ] Can upload images
- [ ] Can generate AI content
- [ ] Can save and publish

## Performance Tips

### Speed Up Builds

```bash
# Use BuildKit for faster builds
export DOCKER_BUILDKIT=1
export COMPOSE_DOCKER_CLI_BUILD=1

docker-compose up --build
```

### Reduce Image Size

Already optimized with:
- Multi-stage builds
- Alpine Linux base images
- Production dependencies only

### Persistent Data

Database data is stored in Docker volume `mysql_data`:
```bash
# List volumes
docker volume ls

# Inspect volume
docker volume inspect voxblog_mysql_data

# Backup volume
docker run --rm -v voxblog_mysql_data:/data -v $(pwd):/backup alpine tar czf /backup/mysql-backup.tar.gz /data
```

## Next Steps

Once local testing is successful:

1. ✅ Commit your changes
2. ✅ Push to Gitea
3. ✅ Deploy to VPS using deploy.sh
4. ✅ Set up Caddy reverse proxy
5. ✅ Configure CI/CD

## Common Issues & Solutions

### Issue: "Cannot connect to Docker daemon"
**Solution**: Start Docker Desktop

### Issue: "Port 3000 is already allocated"
**Solution**: Stop other services or change port in docker-compose.yml

### Issue: "Build takes too long"
**Solution**: First build is slow (5-10 min). Subsequent builds are faster.

### Issue: "MySQL not ready"
**Solution**: Wait 30 seconds after starting. MySQL needs time to initialize.

### Issue: "API returns 500 error"
**Solution**: Check .env file has all required variables, especially OPENAI_API_KEY

### Issue: "Images not uploading"
**Solution**: Check S3 credentials in .env file

## Quick Reference

```bash
# Start
docker-compose up -d

# Stop
docker-compose down

# Logs
docker-compose logs -f

# Rebuild
docker-compose up --build

# Clean up
docker-compose down -v
docker system prune -a
```

---

**Ready to test!** Start Docker Desktop, then run `docker-compose up --build` 🚀